My brother's '99 intrigue heater controls are not working. It has the electronic controls and no matter what setting they are on, air blows out all of the vents. It didn't really matter in the summer, but since winter is fast approaching, he will need to use the defrost. Also when you change the temperature, you have to cycle the key a couple times before the temp will change. I am thinking it is the blend door, but just wanted to be reassured before my parents start throwing money at it.

Also will I have to pull apart the whole dash to replace the blend door if that is what it is?